Organization, Basis of Presentation and Significant Accounting Policies (Policies)	3 Months Ended
	Nov. 30, 2019
Accounting Policies [Abstract]
Basis of Accounting, Policy	These unaudited condensed consolidated financial statements reflect, in the opinion of management, all normal recurring adjustments necessary for a fair statement of our financial position, results of operations and cash flows for the periods presented. The results of operations and cash flows for interim periods are not necessarily indicative of results for a full fiscal year because of the seasonal nature of our businesses, among other things. Our unaudited condensed consolidated financial statements and notes are presented as permitted by the requirements for Quarterly Reports on Form 10-Q
Consolidation, Policy	should be read in conjunction with the consolidated financial statements and notes thereto for the year ended August 31, 2019, included in our Annual Report on Form 10-K, filed with the Securities and Exchange Commission ("SEC").
Significant Accounting Policies [Text Block]	Significant Accounting Policies The following significant accounting policy was updated or changed since our Annual Report on Form 10-K for the year ended August 31, 2019. Leases As described in the "Recent Accounting Pronouncements" section, we adopted Accounting Standards Update ("ASU") No. 2016-02, Leases, as amended (collectively "Accounting Standards Codification ("ASC") Topic 842"), on September 1, 2019, using the modified retrospective approach. Our accounting policies and additional disclosures with respect to ASC Topic 842
Recent Accounting Pronouncements	Recent Accounting Pronouncements Except for the recent accounting pronouncements described below, other recent accounting pronouncements are not expected to have a material impact on our condensed consolidated financial statements. Adopted We adopted ASC Topic 842 as of September 1, 2019, using the modified retrospective approach. In addition, we used the additional optional transition method and package of practical expedients in the period of adoption without retrospective adjustment to previous periods presented, although we elected not to apply the hindsight practical expedient available under the standard. As a result of using the modified retrospective method, prior periods have not been restated, and a $33.7 million cumulative-effect adjustment was recorded to increase the opening balance of capital reserves as of the adoption date related to recognition of previously deferred gains associated with the sale-leaseback of our primary corporate office building located in Inver Grove Heights, Minnesota. Additionally, adoption of ASC Topic 842 resulted in the recognition of operating lease right of use assets and associated lease liabilities of $268.4 million and $267.0 million, respectively, as of September 1, 2019. Adoption of ASC Topic 842 did not have a material impact on our Condensed Consolidated Statements of Operations or Condensed Consolidated Statements of Cash Flows. Additional information and further disclosures related to our leases and lease-related financial statement amounts is included within Note 14, Leases. Not Yet Adopted In June 2016, the Financial Accounting Standards Board issued ASU No. 2016-13, Financial Instruments - Credit Losses (ASC Topic 326): Measurement of Credit Losses on Financial Instruments. The amendments in this ASU introduce a new approach, based on expected losses, to estimate credit losses on certain types of financial instruments. This ASU is intended to provide financial statement users with more decision-useful information about the expected credit losses associated with most financial assets measured at amortized cost and certain other instruments, including trade and other receivables, loans, held-to-maturity debt securities, net investments in leases and off-balance-sheet credit exposures. Entities are required to apply the provisions of this ASU as a cumulative-effect adjustment to capital reserves as of the beginning of the first reporting period in which the guidance is adopted. This ASU is effective for us beginning September 1, 2020, for our fiscal year 2021 and for interim periods within that fiscal year. We are currently evaluating the impact adoption will have on our condensed consolidated financial statements.